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Hi Yvan,

If that is the case, then the cms.space is set too low and it is selecting 
servers who have "enough" space but the "enough" is not that much. You 
will see in the log a periodic reporting of free space statistics from all 
your servers. The lines look something like:

170616 01:17:28 26648 Node: xxxxxx.slac.stanford.edu load=0; cpu=0 net=0 
inq=0 mem=0 pag=0 dsk=0 utl=0 shr=[100 73 0]

could collect all of them for your servers and send tem to me (you hide 
any sensitive info).

Andy

On Fri, 16 Jun 2017, Yvan Calas wrote:

>> On 15 Jun 2017, at 18:53, Yvan Calas <[log in to unmask]> wrote:
>>
>> I would like to understand how to correctly set up the parameter cms.space in XRootD. We currently observe error messages like this one on our servers:
>>
>> 170615 18:42:06 285690 XrootdXeq: alisgm76.15597:26@[::xxx.xxx.xx.x] pub IPv4 login as alisgm76
>> 170615 18:42:06 285690 ofs_open: alisgm76.15597:26@[::xxx.xxx.xx.x] Unable to create /03/01818/8cb7a7f4-51e9-11e7-a169-ef6caac907fd; no space left on device
>> 170615 18:42:06 285690 XrootdXeq: alisgm76.15597:26@[::xxx.xxx.xx.x] disc 0:00:00
>>
>> In order to solve this issue, I reduced the recalc parameter to 1 minutes and try different thresholds for the "min" and "hwm" parameters as described in [1]. Actually, we have:
>>
>> cms.space linger 0 recalc 1 min 100g 150g
>>
>> and the xrootd partition is as follow:
>>
>> Filesystem            Size  Used Avail Use% Mounted on
>> /dev/mapper/datavg-data
>>                      110T  110T  109G 100% /xrootd
>>
>> I tried to change the value of the hwm parameter (below and above 100g) but without success, the error messages remain.
>>
>> Could you please tell me if there is something wrong with my setting?
>
> I would like to add that some of our servers have a lot of free (available) space, so they should be chosen by the redirector IMHO. Do you think this is a bug (we are currently running XRootD v4.2.3-3).
>
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